Asteroids

2015TC25 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.909

Aphelion (Q)

1.148

Eccentricity (e)

0.116

Inclination (i)

3.7

deg

Orbit period (P)

380.9

Earth MOID

0.00153

U parameter

3.7

A₁

162127.7

10^-15au/days²

A₂

-4412.8

10^-15au/days²

Next Earth close approach

Date

2039-10-06

Nominal distance (from Earth center)

0.07562

11312308

Maximum Brightness

26.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

29.3

mag

Diameter

4 - 8*

Taxonomic type

Rotation period (T)

0.03715

Discovery Information

Discovery Date

2015-10-11

Observatory

Catalina Sky Survey

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.028396

1-sigma variation

0.000001

Unit

Eccentricity (e)

Value

0.116229

1-sigma variation

1.614E-7

Unit

Inclination (i)

Value

3.7435

1-sigma variation

6.424E-6

Unit

Long. of Ascending Node (Ω)

Value

18.8519

1-sigma variation

4.094E-6

Unit

Arg. of Perihelion (ω)

Value

80.5704

1-sigma variation

4.874E-5

Unit

Mean Anomaly (M)

Value

181.41531

1-sigma variation

0.00239

Unit

Perihelion distance

Value

0.908867

1-sigma variation

Unit

Aphelion distance

Value

1.147926

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.002706

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.031328

1-sigma variation

Unit

MOID

Value

0.001527

1-sigma variation

Unit

Orbit Period

Value

380.9248

1-sigma variation

Unit

U parameter

Value

3.7

1-sigma variation

Unit

A₁

Value

162127.65638

1-sigma variation

19365.45466

Unit

10^-15au/days²

A₂

Value

-4412.75154

1-sigma variation

2631.56000

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₁	A₂
a	9.65336E-13	-1.36247E-14	-2.17677E-12	-1.78123E-12	4.68650E-11	-2.34872E-9	9.44570E-3	2.57052E-3
e	-1.36247E-14	2.60577E-14	7.04330E-13	-7.61286E-14	5.47175E-14	2.20081E-11	-1.30780E-3	-7.02616E-5
i	-2.17677E-12	7.04330E-13	4.12661E-11	7.47322E-12	-1.18345E-10	5.40493E-9	-1.08127E-1	-7.38882E-3
Ω	-1.78123E-12	-7.61286E-14	7.47322E-12	1.67609E-11	-1.11866E-10	4.61775E-9	-4.71922E-2	-5.03913E-3
ω	4.68650E-11	5.47175E-14	-1.18345E-10	-1.11866E-10	2.37535E-9	-1.15300E-7	5.60664E-1	1.25527E-1
M	-2.34872E-9	2.20081E-11	5.40493E-9	4.61775E-9	-1.15300E-7	5.73119E-6	-2.41207E1	-6.26004E0
A₁	9.44570E-3	-1.30780E-3	-1.08127E-1	-4.71922E-2	5.60664E-1	-2.41207E1	3.75021E8	2.95527E7
A₂	2.57052E-3	-7.02616E-5	-7.38882E-3	-5.03913E-3	1.25527E-1	-6.26004E0	2.95527E7	6.92510E6

Date of computation: 2025-09-10 00:30 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

0.03715

Unit

Source

[1]

Quality

Value

Unit

Source

[1]

Amplitude

Value

0.4

Unit

mag

Source

[1]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

29.339

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[3]

Diameter

Value

4 - 8*

Unit

Source

[3]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[4]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Reddy. V.; Sanchez, J.A.; Bottke, W.F.; Thirouin, A.; et al. (2017) Astron. J. 152, A162.
[2]	ESA Aegis	ESA orbit determination and impact monitoring system
[3]	Estimation	Estimated from absolute magnitude
[4]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

562

Unit

Source

[1]

Unobserved

Value

3093

Unit

Source

[1]

Normalized RMS of residuals

Value

0.476782

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-10-11.29013

Unit

Source

[2]

Last Observation

Value

2017-04-25.246963

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

46 (0)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2015-10-17

Unit

Source

[3]

Last Observation

Value

2015-10-18

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

2 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2015TC25 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1969-10-06 23:56	321.3	0.0521456	0.0443960	0.0025834
EARTH	1970-04-22 03:59	> 1 d	0.1962701	0.1935722	0.0008999
EARTH	1977-10-23 06:55	218.8	0.0257279	0.0249920	0.0002453
EARTH	1978-03-30 06:01	450.9	0.1607359	0.1602522	0.0001613
EARTH	1986-02-16 06:13	29.9	0.1156057	0.1144395	0.0003888
EARTH	2000-10-30 01:52	91.1	0.0348870	0.0346959	0.0000637
EARTH	2001-03-23 07:27	142.0	0.1527982	0.1526434	0.0000516
EARTH	2015-10-13 07:31	< 1 s	0.0007410	0.0007410	0.0000000
EARTH	2016-07-02 00:17	< 1 min	0.1498448	0.1498439	0.0000003
EARTH	2017-03-26 14:52	< 1 s	0.0196166	0.0196165	0.0000000
EARTH	2039-10-06 11:28	20.2	0.0756181	0.0748105	0.0002692
EARTH	2040-07-31 23:03	368.6	0.1370157	0.1368357	0.0000600
EARTH	2041-01-21 08:08	453.7	0.0940583	0.0939012	0.0000524
EARTH	2041-04-29 12:19	275.4	0.0986525	0.0982269	0.0001419
EARTH	2042-04-01 05:26	11.1	0.1468847	0.1463569	0.0001759
EARTH	2064-10-01 11:55	42.9	0.1424248	0.1399227	0.0008341
EARTH	2065-09-02 16:35	1267.4	0.1075756	0.1060249	0.0005176
EARTH	2065-12-06 16:45	1388.4	0.0898912	0.0890526	0.0002804
EARTH	2066-05-27 22:05	1068.8	0.1307346	0.1299643	0.0002572
EARTH	2067-03-29 02:29	41.1	0.0804348	0.0783586	0.0006925
EARTH	2089-10-09 12:01	432.5	0.0147297	0.0024713	0.0041442
EARTH	2090-07-31 09:09	> 1 w	0.1321583	0.1165893	0.0051955
EARTH	2091-01-15 04:06	> 1 w	0.1003073	0.0895438	0.0035981
EARTH	2091-05-18 05:57	> 1 w	0.1123925	0.0864324	0.0110184
EARTH	2092-04-02 02:38	6.0	0.0593116	0.0073047	0.0422477
EARTH	2120-10-07 08:18	> 1 d	0.0696023	0.0014962	0.1738226
EARTH	2121-08-26 14:07	> 1 mo	0.1124133	0.0544901	0.0684557
EARTH	2121-12-16 01:59	> 1 mo	0.0967625	0.0562447	0.0352087
EARTH	2122-06-09 17:42	> 1 mo	0.1314108	0.0627341	0.0320669
EARTH	2123-04-02 02:20	> 1 d	0.0145731	0.0094396	0.0529431

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
285.03737193	276.60785925	0.00128503	MINIMUM
79.78290589	82.71224278	0.01742709	MINIMUM
3.04899244	0.58743745	0.09671504	SADDLE
181.97666243	178.91115162	0.14904484	SADDLE
359.69768112	176.88137729	1.92412504	SADDLE
179.42938872	356.60852546	2.13051972	MAXIMUM

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MOID Plots

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